CY7C421-15AC Cypress Semiconductor Corp, CY7C421-15AC Datasheet - Page 7

• Manufacturer Part Number: CY7C421-15AC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C421-15AC

• Configuration: Dual
• Density: 4.5Kb
• Access Time (max): 15ns
• Word Size: 9b
• Organization: 512x9
• Sync/async: Asynchronous
• Expandable: Yes
• Bus Direction: Uni-Directional
• Package Type: TQFP
• Clock Freq (max): Not RequiredMHz
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / RoHS Status: Not Compliant

Switching Waveforms
Document #: 38-06001 Rev. *D
Notes
10. W and R ≥ V
11. t
MRSC
= t
R, W
PMR
Q
D
0
0
[10]
IH
–Q
–D
MR
HF
HF
EF
FF
+ t
W
R
W
around the rising edge of MR
R
RMR
8
8
.
HALF FULL
t
LZR
t
PW
t
A
Figure 4. Asynchronous Read and Write
t
t
WHF
RC
t
t
t
SD
t
HFH
FFH
EFL
DATA VALID
t
WC
DATA VALID
Figure 5. Master Reset
Figure 6. Half-full Flag
t
t
PMR
MRSC
t
RR
t
DVR
t
HD
[11]
t
WR
t
A
t
PR
HALF FULL+1
t
t
WPW
RPW
DATA VALID
t
RMR
DATA VALID
t
HZR
CY7C419/21/25/29/33
t
RHF
HALF FULL
Page 7 of 16
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